Device Overview
Introduction
The EM4302T-LRW is a MID Certified three phase DIN rail installation multi-function energy meter with LoRaWAN communication.
The device can support measurement and analysis of a variety of power parameters, such as voltage, current, the four quadrant power parameters, power factor, harmonic content etc.
Meanwhile it can also provide the measurement of multiple electric energy parameters , such as two way active energy, reactive energy, monthly and daily electricity consumption statistics.
The EM4302T-LRW can also support the analysis of electric power parameter measurement in 1P2W,3P4W,3P3W grid environment.
It’s suitable for power monitoring of photovoltaic inverter, new energy electricity consumption, statistical analysis, real time power monitoring and a variety of other environments, and has high stability and long life characteristics.
The EM4302T-LRW has a RS485 Modbus and LoRaWAN® communication interface. It can easily realize the function of remote data reading, and adopts the design of large-screen LCD and touch-sensitive key, which can easily carry out the local view and set operation of a variety of parameters. The device is password protected, which ensures the data security of the product.
The EM4302T-LRW device is a multi-functional electric energy meter designed for power system utilities and intelligent buildings. It's complete communication function is very suitable for various control systems, SCADA systems and energy management systems.
Features
External current transformers of output types such as 5A/100mV/100mA are supported, direct access of Rogowski coil is also supported.
Current transformer reverse connection correction function.
Support external voltage transformer access, input voltage minimum support 30V.
DIN Rail mounting, standard 4 modules width.
Touch button design improves button operability and reduces button failure rate
Multi-function parameter measurement, providing voltage, current, active power, reactive power, apparent power, power factor, phase angle, etc.
Provides the analytical data of the total harmonic contents of voltages and currents
Provides a variety of statistical data and local storage functions, such as two-way power, demand and other statistical data. Provide monthly electricity consumption statistics for the last 12 months and daily electricity consumption statistics for the last 31 days.
Supports the dual-timing function of the meter startup running time and load running time.
Supports the access of a 2-tariff switching signal for metering at 2-tariff energy.
Support RS485 communication function, baud rate up to 38400bps.
Supports one optocoupler pulse output interface, output parameters can be set.
LCD refresh time is 1 second, support manual or automatic scroll display (configurable)
Package contents
The device is delivered in a carton package containing the following:
The EM4302T-LRW device in a standard 35mm DIN Rail Enclosure.
Quick Start Manual
Dimensions
Values are in millimeters
Device Sticker
The device sticker is printed on the right side of the device enclosure and contains information about model, version, LoRaWAN region and other important parameters for device identification and configuration.
Installation
The device is not dependent on location or position. The device is designed to fit on 35mm DINÂ rails (EN 50022) or to be installed with a front installation frame. To remove the meter from a DIN Ârail just pull the spring loaded bolt on the underside.
The cabling for the current transformer should be held as short as possible. In case of significant measurement errors after Installation, please consider the following points:
The use of Rogowski Âcoils as current transformers for the converter counter is discouraged because of the multiple current / voltage transformation and external amplifiers. Each transformation adds a multiplicative error on the measurement.
Energy Direction (current transformer) : If all currents are expected to be positive (import measurement) but one or several currents are negative, please check the correct installation of your current transformers as they have been wrongfully installed.
Transformer Ratio (current transformer) : The transformer ratios on the meter must be the same as the ones of the installed current / voltage transformers.
Correct Phase assignment: Current L1 and Voltage L1 must be connected to the same measurement system. See Connection Diagram.
Make sure that all connected wires are voltage free before you install / change or check the meter. Touching any live elements is dangerous to life!
The CT models have voltage on the current paths! Make sure that the voltage connections are voltage free before you install the current transformer. Touching any live elements is dangerous to life!
The installation of the meter must be carried out by qualified and trained personnel. Current transformers must not operate open loop as high voltages can occur. These voltages can lead to substantial personal and/or property damage.
Nonobservance of mounting and installation instructions may lead to damage or destruction of this meter.
Last updated
